/**
 *    Copyright 2010-2016 the original author or authors.
 *
 *    Licensed under the Apache License, Version 2.0 (the "License");
 *    you may not use this file except in compliance with the License.
 *    You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 *    Unless required by applicable law or agreed to in writing, software
 *    distributed under the License is distributed on an "AS IS" BASIS,
 *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *    See the License for the specific language governing permissions and
 *    limitations under the License.
 */
package org.mybatis.spring;

import static org.springframework.util.Assert.notNull;

import org.apache.ibatis.session.ExecutorType;
import org.apache.ibatis.session.SqlSession;
import org.springframework.dao.support.PersistenceExceptionTranslator;
import org.springframework.transaction.support.ResourceHolderSupport;

/**
 * Used to keep current {@code SqlSession} in
 * {@code TransactionSynchronizationManager}. The {@code SqlSessionFactory} that
 * created that {@code SqlSession} is used as a key. {@code ExecutorType} is
 * also kept to be able to check if the user is trying to change it during a TX
 * (that is not allowed) and throw a Exception in that case.
 *
 * @author Hunter Presnall
 * @author Eduardo Macarron
 */
public final class SqlSessionHolder extends ResourceHolderSupport {

	private final SqlSession sqlSession;

	private final ExecutorType executorType;

	private final PersistenceExceptionTranslator exceptionTranslator;

	/**
	 * Creates a new holder instance.
	 *
	 * @param sqlSession   the {@code SqlSession} has to be hold.
	 * @param executorType the {@code ExecutorType} has to be hold.
	 */
	public SqlSessionHolder(SqlSession sqlSession, ExecutorType executorType, PersistenceExceptionTranslator exceptionTranslator) {
		notNull(sqlSession, "SqlSession must not be null");
		notNull(executorType, "ExecutorType must not be null");

		this.sqlSession = sqlSession;
		this.executorType = executorType;
		this.exceptionTranslator = exceptionTranslator;
	}

	public SqlSession getSqlSession() {
		return sqlSession;
	}

	public ExecutorType getExecutorType() {
		return executorType;
	}

	public PersistenceExceptionTranslator getPersistenceExceptionTranslator() {
		return exceptionTranslator;
	}

}
